Mantel frame



FIG. 1 is a front side perspective view of the mantel frame showing our new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and

FIG. 6 is a top side view thereof; and,

FIG. 7 is a bottom side view thereof. 

CLAIM The ornamental design for the mantel frame, as shown and described. 